eunormia E-Invoice API

About eunormia E-Invoice API

eunormia is an API service that converts invoice data into e-invoices compliant with the EN 16931 standard, producing ZUGFeRD/Factur-X PDF/A-3 files. It accepts input as JSON, CII-XML, or a guided form, combining the structured data with a PDF to generate the compliant output. Every generated invoice passes through an automated validation gate before delivery, and invoice data and PDFs are processed only in memory without being stored.

The service is aimed at developers and companies that need to automate the creation of standards-compliant e-invoices as part of their invoicing or accounting workflows, integrating conversions via an HTTP API. Documentation covering endpoints and examples is provided for integration purposes.

The product is currently in beta, during which all conversions are free and include the full validation gate. The company is also recruiting a limited number of pilot partners who receive free access beyond the beta period in exchange for feedback and serving as a reference, with selection subject to availability.

Key features

• Generates ZUGFeRD/Factur-X PDF/A-3 e-invoices compliant with EN 16931
• Automated validation gate checks every output before delivery
• Processes invoice data and PDFs in memory only, never stored
• Accepts guided form input, structured JSON, or CII-XML
• HTTP API for automated invoice conversions

Frequently asked questions